Typewriting machine



April 15 1924. 1,490,131

. G. A. SEIB TYPEWRITINQ MACHINE Filed Deq- 15 1921 2 Sheets5heet 1 L mmW 1- 'WIMK $13 W WITNESSES Patented Apr. 15, 1924.

UNITED STATES I 1,490,131 PATENT OFFICE.

GEORGE SEIB, 0 F ILION, NEW YORK, ASSIGNOR TO REMINGTON TYPE'WRITER COM-BANY, OF ILION, NEW YORK, A CORPORATION OF NEW YORK.

:TYPEWRIT'YING MACHINE.

Application fi1ed December 15, 1921. Serial No. 522,505.

T 0 all whom it may concern.

Be it known that I, GEORGE A.-SEIB, citi zen of the United States, andresident of Ilion,'in the county of Herkimer and State: of New York,have invented certain new and useful Improvements. in TypewritingMachines, of which the following is a specification, 1

My present invention relatesto ribbon vibrating mechanism fortypewriting ma chines and its principal object .generally stated is toprovide new and improved mechanism of the specified character. Aspecific object of the invention is to improve the ribbon vibratingmechanisms disclosed in'my'prior'iatent No. 1,203,795, granted Nov. 7,1916, and in the patent of John H. Barr, No. 1153,668, granted Sept. 14,1915.

To the above and other ends which Will hereinafter appear mypresentinvention consists in the features of construction, combination's ofdevices and arrangements of parts hereinafter described and particularlypointed out in the claims. 7 v

' In prior constructions it has frequently happened in dolng two-colorwork that when writing in red or through. the lower half or field of theribbon. the'first few' characters at the beginning of a line will betipped at their upper port-ions or tops with black or the color of theupper field. This also has been found likely to occur with the firstfew'characters following the switch or change from black to red or fromthe upper to the' lower ribbon field whenever such switch has been madein the course of the writing. whether at the beginning of a line' ornot.

To cure. this and similar defectsl introduce in the train of vibratingdevices between the printing keys'and vibrator a' lost motionconnection.which is so related to the ribbon stop devices that'it does notcomeiinto play until after the vibrator has V a'ry type bar segment 11.

been moved to printing position andlhas been positively arrested in suchposition by the ribbon stop devices." Thereafter; the lost motionconnection allows the actuated printing key to be further depresseduntil In the it reaches thebottom of its stroke. present instance thelost motion connectlon is provided by forming an'arm or ",le ver; memberwith a slot having a cam portion. and a dwell portion, said slotengaging thecross rod of the oscillator or rocking frame. I

When a printing key is depressed'the cam portion'of the slot operates toswing the oscillator and move the vibrator until it is arrested inprinting position by the ribbon stop devices, the dwell portion of theslot thenb'ecoming effective to enable the arm or lever thereafter tomove idly until the end of the key stroke, and without affecting thevibrator or the oscillator which will be maintained in operativeposition by the co-operation of the dwell with the cross rod of theoscillator.

My invention will be more particularly described in connection with theaccompanying drawings wherein,

Figure 1 is a front-to-rear vertical sectional view of a No. 10Remington typewriting machine embodying the preferred form of myinvention, said view being taken about centrally and showing only somuch of said machine as is necessary to a clear understanding of myinvention.

Figure 2 is. a fragmentary sectional view taken on aplane indicated bythe section line 1-1 in Fig. 1 and looking downward in'tlie direction ofthe arrow at said line.

Figure 3 is a fragmentary operating view showing the position of theparts when set for red and after the vibrator has been moved to printingposition, by the cam slot, the printing stroke however not yet beingcompleted.

Figure 4 is a vertical sectional view taken on the section line 22 inFig. 8 and looking in the direction of the arrow at said line.

As appears from Fig. 1 the main frame of the machine comprises a base 1,posts 2 and a top plate 3 that supports guide rails for a platencarriage consisting of a rela tively movable truck and platen frame, aplaten 6, being mounted on said frame which comprises end bars, notshown, and a connectin'g' cross. bar 8. (Jo-operative with the platenare type bars 9 fulcrumed on a pivot wire'lO supported on a statior- Thetype bars are housed in slots .12 in the segment ,11; normally rest onapadded support 13; and have type blockseach with two types 14 and 15. Aslot 16 in each type bar is engaged by a pin 17 projecting from a lever18, the levers 18 being mounted on a pivot wire 19 secured to a bar 20.The levers 18 are pivotally connected at 21 with key 1evers22 fulcrumedon'a plate 23 secured to the base 1, the upper edges of the key 1eversbeing notched to engage with the rounded bottom edge of the fulcrumplate. Each key lever has a key cap 24 and is provided with a restoringspring 25.

For the purpose of preventing the key levers from becoming accidentally'unhooked or displaced from the fulcrum plate 23, I provide a retainingplate 27 formed of sheet metal and extending flatwise transversely ofsaid kev levers below their .fulcrums. The retaining plate is providedwith in tegral arms 27 a terminatingin ears 28 which receive fasteningscrews 29, said screws .being threaded into bosses at the underside oftheroof of the base 1 and securing both the fulcrum plate and theretaining plate in place on the frame. In ordert'o prevent the keylevers from chattering or striking the metallic retaining plate directlyin the course of rapid operation, the upper surface of said plate ispreferably faced with a strip 26 of felt or the like. The :key leversnormally lightly contact with said strip or pad, which reduces noise ofoperation.

The actuation of any printing key '24 swings the associate type bar 9into printing contact with the front face of 'the platen 6 whichnormally is in lower case position so that the inner or lower case type14 will print. However, the platen may be shifted upward at will to uper case position by means of the usual shlft mechanism of the No. 10Remington machine, so as to enable the outer or upper case types toprint.

Each type bar has a contact face 30 that actuates a universal bar 31housed in a depression 32 in the segment 11, and operative on the usualescapement mechanism.

The types are adapted to print throu h aribbon 33 which may be dividedlongitu inally into two fields or stripes of different characterists orcolors, such as a black field a and a red field b. The ribbon is woundon spools 34 mounted on shafts 35 (Fig. 1), which are adapted to beconnected alternately to the spring drum, as usual, so as to causeturning movements of the spools and winding on and oil of the ribbon.From each spool the ribbon extends upward" through an opening in the.top plate and over a guide 36 fixed to the top plate, and thence to avibrator 37, having guide openings formed by the upper end portions ofsaid vibrator and hooks 38 carried thereby. The printing portion of theribbon extending between the guide openings in the vibrator participatesin vibratory move-- ments thereof. A central type guide 39 which isfixedly secured to the front of the segment 11 provides guide ways forthe vibrator, the stem whereof terminates in a lip 40, and hasrearwardly turned lugs 41. The space 42 between the lugs 41 and theledge receives a cross pin 43' carried by an operating lever frame 44.The

construction provides a loose pivotal connection between the vibratorand said lever or frame 44 which is made of sheet metal and comprises ahorizontally disposed arm -45, a vertically disposed arm 46 andlaterally extending arms 47 terminating in perforated cars 48. Adiagonal brace 49 connects "the arms and 46. The ears 48 fit looselyover a pivot rod 50 carried by a supporting frame or member which ismounted on a stationary bracket and maintained in sprin pressedrelationship with the carriage in both case positions, participating incase shifting movements of said carriage. Said supporting frame 51 ispreferably a single piece and comprises a cross bar .52, side portions53, having downward extensions 54, and arms 55 lnclined up ward andforward from the bar 52 and to which is secured the usual device 56which serves as line gauge and paper guide. The vibrator vibratesbetween the part .56 and the type guide 39. The pivot rod .50 issupported on the side' portions '53, being fixed in place by means of aclamping .nut 50, one end of said rod being reduced to form a shoulderand threaded to receive said nut which acts to clamp said shoulderagainst the inner face of the adjacent side portion v53. The downwardlyextending portions .54 of said frame carr screw pivots 57 to which arepivoted pans of parallel links 58 and 59, the lower pair 59 whereof formthe sides of a U-shaped bail which further includes a cross bar 60. Thelinks 58 and hail 59, 60 are supported on a casting or bracket61comprising a horizontal portion 62, and side portions 63 terminatin inforwardly extending portions 64 joined by a web 65, said bracket beingsecured by screws 66 to bosses 3" on the top plate 3. The upper pair oflinks 58 are pivoted on screw pivots 58 projecting from the 'sides .63,while the bail 59, 60 is pivoted on lower screw pivots 59, thusproviding between the frame 51 and the bracket 61 a linkage connectioncomprising the links 58 andthe bail 59., 60, the latter synchronizing.movements at the two sides. Coiled draw springs 67 anchored to thescrews 58 and hooked over pins 68 projecting from the sides 54 of theframe 51 constantly urge said frame upward as a whole. The cross bar 52is provided with a lug 69 carrying a pin 70 on which is mounted a roller'71 which engages with the under side of a stop. bar

or blade 72 extending along the rear of the 1 carriage frame bar 8 andsecured, thereto by screws 73. The springs67 constantly maintain theroller 71 engaged with the bar 72, said bar running over said rollerduring the carriage travel. Also, when the platen is shifted to uppercase, causing the bar 72 to irise,,the roller will continue in con tactwith it due to the spring pressure, and the supporting frame 51 willmove upward on its linkage, carrying with it the pivot rod which in turnwill carry or shift bodily upward the operating lever 44 and the ribbonvibrator 37 so that their normal relationship to the platen will remainthe same in upper case position as in lower case. The lever arm 46 isconnected by links 74 with the upper arms of actuators 75 and 76 whichhave cross portions 77 and 78 terminating in ears 79 and 80 perforatedto fit over a pivot rod 81 which is fixed to the extensions 64 ofthe'bracket 61. The actuators are loosely confined between saidextensions so that they cannot move endwise of the pivot rod 81 but mayturn freely thereon. Said rod projects out- .wardly be 0nd theextensions 64, one of the exte'n ed portions of the rod being reduced toform a shoulder and threaded to receive a clamping nut 81 (Fig. 4) whichco-operates with said shoulder to clamp the rod to the contiguousextension or car 64. Beyond its threaded portion, the rod 81 has anotherreduced portion 81", made smooth to support one side of a rectangularrocking frame or oscillator 82, the body of the rod 81 supporting therocking frame at its opposite side. Said rocking frame or oscillator 82comprises a head 83 and side portions 84 connected by a cross rod or bar85. The side portions 84 have bushings 84 which bear on the pivot rod81, said oscillator being adapted not only to rock on said rod andvibrate the ribbon but also to be slid lengthwise of said rod to changeribbon fields. The cross head or bar 83 is out out to provide a narrowportion or throat 83 which is adapted to receive the actuators 75 and 76and communicate efiective movements thereto.

7 When one actuator is in the throat the other actuator is ineffective,and vice versa. For mimeog'raphing or similar purposes the oscillatormay be moved to a position where neither of the actuators engages insaid throat. The actuator 75 communicates longer movements or throws tothe operating lever 44 than the actuator 76 for the reason that theupper link 74 which connects the actuator 75 with the lever arm 46 actsfurther from the common pivotal center 81 than does link 74 of actuator76; and also because said upper linlr'is connected to the operatinglever 44 closer to its center of movement 50 than is the lower link 74.The parts are so constructed and adjusted that when the actuator 75 isengaged in the throat 83 the oscillator 82 will operate through saidactuator to transmit movement to the upper link 74, operating lever 44and vibrator 37 suflicient to raise the lower or red field b of theribbon to cover,

the printing point. This adjustment of the will lift the vibrator andribbon to a lesser extent so as to present the upper ribbon field aopposite the printing point. During case shifting movements the links 74will swing about their pivotal connections with their associateactuators as fixed centers.

Sliding movements of the oscillator 82 lengthwise of and on the rod 81to change ribbon fields are effected at will by a train of devicescomprising a perforated ear 84 (Fig. 4) on the left-hand side portion 84in which ear is hooked loosely the inner end of a connecting link 86.The link curves downward and leftward and at its left-hand end is offsetforward being pivotally connected at 87 with a crank arm 88 fixed to therear end of a horizontal rock shaft 89, bearing in hangers or supports90 and 91 and provided with a finger button 92 (Fig. 1). Rockingmovements of the shaft are transmitted through the crank arm 88 and link86 t0 the oscillator 82 which may thus be slid from the full line or redfield position in Fig. 4 to the dotted line or black field position, ormay further be moved leftward tomimeograph position. The usual or othersuitable indicating, stop and detent devices are provided in connectionwith the ribbon fieldchanging rock shaft 89 and button 92 to indicatethe ribbon field, to positively arrest the parts and to maintain themset in arrested positions.

Referring now to the means for transmitting the actuating movements ofthe printing key levers 22 to the oscillator 82, there is supported onthe cross rod 85 of the oscillator a sleeve or spool 93 formed with agroove 94 for co-operation with a member or part with which my presentinvention is more particularly concerned. Said member is in the form ofa pivoted arm or lever 95 which will hereinafter be described in detail.The arm 95 has pivotally connected to it between its ends at 96 theupper end of a link 97, the lower end of said link being pivotallyconnected at 98 with an arm 99 arranged about centrally of the machineand pivoted on a cross rod 100 secured at its ends in the sides of thebase. The arm 99 is comprised in a universal bar frame which furtherincludes side arms 101 pivotally supported on the cross rod 100 near itsends, the side arms 101 and the central arm 99 being connnected by auniversal bar which is in the form of an inverted trough or channel bar102 which may be made of sheet metal and suitably secured to projectionson the arms 99 and 101, the interior of the channel or trough beingfilled or stuffed with suitable material indicated at 103 such as feltor the like. The key levers 22 are provided at their under .sides withtongues 22 which are adapted to co-operate with the top of the universalbar 102 and swing the universal bar frame down on its pivotal axis 100,thus pulling down the link 97 and actuating the arm 95 to vibrate theribbon as hereinafter described. It will be observed that the ribbonuniversal bar 102 is distinct from the escapement universal bar 31. Oneof the side .arms 101 is preferably provided with a tail or extension101 and has hooked to it above the pivotal axis 100 one end of a coiledspring 104 which is anchored to a fixed pin 105 projecting inward fromth adjacent side of the base 1, said spring operating to maintain thetail portion 101 of said arm 101 normally in contact with said pin 105,and assisting to restore the universal bar frame and connected parts tonormal position after operation.

The arm 95 is horizontally disposed as shown in Fig. 1 and its rear endis perforated to bear on a shouldered rivet or pivot 106 which, asappears from Figs. 1 and 2, is secured to the forward end of asupporting arm 107. Said arm 107 is formed with a longitudinallyextending slot indicated at 108 which receives headed securing screws109, said screws passing freely through the slot 108 near its ends andengaging in threaded holes formed in the upright portion 110 of anangular bracket which further comprises a'horizontal portion 111 whichseats on the top or outside of the roof of the rear of the base 1 and issecured thereto by headed screws 112. The shanks of the screws 109receive clamping nuts 113 which cooperate with the heads of the screwsto clamp the arm or slidably mounted bearing plate 107 in adjustedrelationship with the bracket 110, 111. As will be seen from Fig. 1 theslot 108 is slightly inclined, so that by loosening the nuts 113 andscrews 109 the arm or slide 107 may be freed and slid backward andforward at a slight inclination to the horizontal. The construction issuch that when the slide is moved forward the pivotal axis 106 is alsoslightly lowered, while when the slide is moved rearward on itssup-porting bracket the pivotal axis 106 will not only be moved rearwardcorrespondingly but will also be slightly raised. It will thus be seenthat provision is made for adjusting the axis about which the arm 95 isadapted to turn, both in a fore-and-aft and also in an up and down. orvertical direction. The link 97 is made in a plurality of parts that arerelatively adjustable, enabling the link to be lengthened or shortenedas desired so as properly to connect the lever member 95 with theuniversal bar 102. The point of connection 96 of the link 97 with thelever 95 is forward of the lever fulcrum 106, and between it and thefront or operating end of the lever. The front end of the lever 95 isprovided with ahead or enlargementwhich is formed with a open-mouthedslot or cutout comprising two parts or portions, an inclined or camportion indicated at 114, which at its upper end merges into a dwellpor- 7 of such thickness that it may fit loosely in the groove 94 in thesleeve 93, and the width of the lot.114 is such that the fingers 95 areconfined between the inner walls of said groove. The construction issuch that the sleeve 93 is retained always in cooperation with the camslot whatever the endwise position of the oscillator 82, the rod slidingback and forth through the sleeve when the oscillator is shifted tochange ribbon fields.

When a printing key lever is depressed, causing the link 97 to pull downthe lever 95 on its pivot or fulcrum 106, the upper inclined edge of thecam slot 114, acting on the cross rod 85 through the sleeve 93, willforce said rod rearward, causing the oscillator 82 to turn on itsfulcrum so that the actuating device or throat portion 83 atits top willmove forward and operate the engaged one of the actuators 75 and 76,cansing such actuator to operate the lever 44 and lift or raise thevibrator 37 to printing position. Movement of the parts will continueuntil the lever 95 has been swung downward far enough to carry the camslot 114 past the sleev 93, a position illustrated in full lines in Fig.3. Assuming the parts are set for red, this movement will present thelower ribbon field b opposite the printing point. This position of theparts is reached and the vibratory movement of the ribbon completedbefore the printing key lever is fully depressed, and during the furtherdepression of thekey lever and until it reaches the bottom of its strokethe dwell portion 115 of the slot will cooperate with the sleeve,sliding down over it. However, since this dwell portion is concentricwith the lever 95 it will not affect the rod 85 or the oscillator 82which, tOgether with the operating lever 44 and the ribbon vibrator,will remain motionless until the end of the key stroke. In other words,after the lever 95 has moved the oscillator to complete the ribbonthrow, the lost motion connection becomes efl'ective.

One of the important features of my present invention is that myimproved vibrator actuating means does not prevent or interfere with thenormal and proper operation of the vibrator arresting means or ribbonstop devices. As heretofore provided in the N o. 10 Remington machinesaid ribbon stop devices comprise a stop device in the form of a screw116 which is threaded horizontally rearward through the lower portion ofthe segment 11, and adjusted so that its rear end or point may serve asan abutment or stop for the oscillator 82. Since the segment 11 isnon-shiftable the stop 116 will also be non-shiftable. For stoppingpurposes in co-operation with the stop 116 the front edge of the head 83is provided with an up-turned tab 83 which is of such width that someportion of its front face is opposite the screw stop 116 in both theblack and red shift positions of the oscillator. This will be understoodfrom Fig. 4 which shows in full lines the left-hand side portion of thestop or tab 83 opposite the. screw stop 116 so that said screw stop willarrest the forward swing of the oscillator when the parts are set forred; while as appears from the dotted lines in Fig. 4 the right-handside ofthe front face of the stop device 83 will contact with the sto116 to arrest the oscillator 82 when it 18 set to oscillate for theblack or the upper field of the ribbon. To insure against overthrowespecially when the lower ribbon is in use an additional stop device isprovided, this being interposed between the vibrator and thestop 116 andin position to co-operate directly with the operating lever frame 44.This additional sto device is preferably made of sheet meta andcomprises a cross portion 117 (Fig. 4) from the top of which projects acentral tongue 118 which is bent or inclined forward and downwardterminating in a stop face or edge. The sto-p device 117, 118 is securedby screws 119 to the front of the cross portion 52 of the supportingframe 51 and so that it may shift up and down with said frame duringplaten shifting operation. The under side of the part 117 is cut out incorrespondence with the usual cutout in the cross portion 52 so as notto prevent or interfere with the vibratory movements of the operatinglever 44. The tongue or stop device proper 118 overlies the arm 45 ofsaid lever, said arm being adapted to contact with the end or edge ofthe tongue when said lever has been thrown upward to its greatestextent, that is, when the red or lower ribbon field is in use. The stops116 and 118 are so adjusted relatively that they are adapted for usesimultaneously when the vibrator receives its highest throw. In otherwords, when the stop device 83 contacts. With the stop 116 to arrest theparts the lever arm 45 is contiguous to or touching the end of the stop118 as will be understood from Fig. 3. It will be understood thatwhenthe upper ribbon field a is in use the stop 118 will not come intoplay as the swing of the operating lever does not carry the arm 45 highenough to bring it into contact with the stop 118. At such times, onlythe lower or non-shiftable stop 116 is effective to arrest the vibratingtrain, said stop 116, as has been stated, being employed to arrest theoscillator both for the long and short throws or vibratory movements ofthe ribbon. The oscillator, of course, has a constant swing or throw,the variation of ribbon throw. being due to the variable throwcommunicated to the operating lever by the actuators and 76.

It will be understood that the lever 95 is so adjusted that it reachesthe end of its operative movement and brings the lower end of the dwell115 or ineffective portion into position for use simultaneously with thecontact of the stop device 83 with the stop 116 so that said stop devicewill remain in effective engagement during the latter portion of thedown swing of the actuating lever 95 when the dwell is engaging thesleeve 93. It will be apparent that by the use of my present invention aconsiderable latitude of adjustment is afforded and this is of greatpractical advantage. In prior constructions where there was no lost mo-.tion connection provided in the actuating train the use of the ribbonstop devices required a comparatively fine adjustment of the individualprinting key levers relative to the ribbon universal bar, the tongues22* being bent or set one at a time so that each was adapted to givesubstantially the same extent of movement to the vibrating train, asotherwise the actuation of some key levers would bringthe stop devices83 and 116 into contact and arrest the vibrating train before the keystrokes were fully completed; in other words, there would result anunevenness in the key strokes unless the individual key levers wereadjusted with care relative to the ribbon universal bar. Such fineadjustments are not required with my improvements since the lost motionconnection between two of'the members or parts of the vibrating traintakes care of any inequalities of adjustment. Furthermore, myinventionis of advantage in avoiding torsion or strain on the universal bar,which has resulted in prior constructions from 1ts abrupt arrest beforethe completion of the key strokes, the contnued downward pressure on thekeys after such arrest tending to strain and twist the bar. Moreover, ithas been found in practice that the defects hereinbefore referred to,due to the failure of the vibrator to be thrown up far enough 1mtiallywhen printing from the lower field is begun, resulting in tipping of thefirst one or more characters with the color of the upper field, areobviated by the use of my present invention, said invention enablingeach type impression to be made entirely from the particular ribbonfield which is in use, this being largely due to the fact that theribbon is raised promptly to its full extent and before the type bar hasreached a printing position. This will be fully apparent from aninspection of Fig. 3. Also, since the ribbon will be brought to. theprinting position and arrested before the type bar reaches the printingpoint, the printing will take place through a motionless ribbonconducing to clearness of impression. Furthermore, any shock on thefingers of the operator, such as might occur in prior constructions whenthe ribbon stop devices arrested the ribbon universal; bar and the keylever before the latter had reached the bottom of its stroke, is avoidedby the use of my present invention, and any kick-back or re-action ofthe oscillator resulting from the contact of its stop 83 'with the stop116 will be prevented by the front side of the dwell portion 115 of theslot in the cam slot lever 95. 7

Various changes may be made without departing from my invention.

What I claim as new and desire to secure by Letters Patent, is

1. Ina typewriting machine, the combination ofa platen, a ribbonvibrator, printing keys, operative connections between said printingkeys and said vibrator, each printlng key being effective before thecompletion of its stroke to move said vibrator to position to causetheribbon to cover the printing point, and means separate from saidoperative connections to prevent overthrow of said vibrator during thecompletion of the key stroke.

2. In a typewriting machine, the combina tion of a platen, a ribbonvibrator, printing keys, operative connections between said printingkeys and said vibrator, each printing key being effective before thecompletion of its stroke to move said vibrator to position tocause theribbon to cover the printing point, and a stationary stop cooperativewith said. connections to prevent movement of said vibrator during thecompletion of the key stroke.

3. In ribbon vibrating mechanism for typewriting machines, thecombination of a ribbon vibrator; a train of key operated actuatingdevices connected thereto and comprising a lever provided with a slothaving a cam portion and a dwell portion; and ribbon stopping means thatbecomes" effective whenthe dwell portion of said slot comes into use.

4. In ribbon vibrating mechanism, for

typewriting machines, the combination of a ribbon vibrator; a train ofkey operated actuating devices connected thereto and com prising a leverprovided with a slot having a cam portion and a dwell portion; and aribbon. stop co -operative with one of the ele ments of said train atthe end of the throw caused by said cam portion, said dwell portionmaintaining said element contactive with said ribbon stop.

5. In atypewriting machine, the combination of a platen, a ribbonvibrator, a universal bar, a train of connections between said vibratorand said universal bar, said train including two elements having alostmotion connection with. each other, printing key levers operative onsaid universal bar, and a stop for arresting said vibrator after it hasreached theprinting position and before the completion of the keystroke. 7

I 6. In a typewriting machine, the combination. of a platen, a ribbonvibrator, a universal bar, a train of connections between said vibratorand said universal bar, said train including two elements having a lostmotion connection with each other, printing key levers operative on saiduniversal bar, and a stop for arresting said vibrator after it hasreached the printing position and before the completion of the keystroke, said lost motion connection becoming effective only after thearrest of said vibrator by said stop.

. 7'. In a. typewriting machine, the combination of a platen, a ribbonvibrator, a universal bar, a. train. of connections between saidvibrator and said universal bar, said train including two pivotedmembers, one provided with a. slot and the other with a portion engagingin said slot, printing key levers operative on said universal bar, and astop for arresting said vibrator after it has reached the printingposition and before the completion of the key stroke.

8. In a typewriting machine,the combination of a platen, a ribbonvibrator, a universal bar, a train of connections between said vibratorand said universal bar, said train including two pivoted members, oneprovided with a slot and. the other with a portion engaging in saidslot, printing key levers operative on said. universal bar, a stop forarresting said vibrator after it has reached the printing position andbefore the completion of the keystroke, and a second stop arrangedbetween said vibrator and said first recited stop. said second stoppreventing overthrow of said vibrator.

9. In a typewriting machine, the combination of a. platen, a ribbonvibrator, connections thereto comprising a member provided with a pin. akey lever, a pivoted arm operated by said key lever and provided with aslot having a cam portion concentric with said pivot and a. connecteddwell portion,

said slot co-operating with said pin, and ribbon stop devices becomingeffective when said dwell portion engages with said pin.

10. In a typewriting machine, the combination of a platen, a ribbonvibrator, a train of key operated actuating devices connected theretoand comprising a pivoted arm having an actuating slot, a stationarysupport on which said arm is pivoted, and means for affording adjustmentof said stationary support.

11. In a typewriting machine, the combination of a platen; a ribbonvibrator; a train of key operated actuating devices connected theretoand comprising a pivoted arm having an actuating slot; a stationarysupporting arm on which said first recited arm is pivoted, saidstationary arm being provided with an elongated slot; a stationarybracket; a pair of-securing screws passing through said elongated slot;and nuts cooperating with said screws to clamp said stationary armadjustably in place on said bracket.

12. In a typewriting machine, the combination of a platen; a ribbonvibrator; a train of key operated actuating devices connected theretoand comprising a pivoted arm having an actuating cam; a stationarysupporting arm on which said first recited arm is pivoted, saidstationary arm being provided with an inclined slot; and means foradjustably securing said stationary arm to the frame of the machine,said stationary arm when adjusted varying the position of the pivot ofsaid first recited arm in a direction fore-and-aft of the machine andalso in an up-and-down direction.

18. In a typewriting machine, the combi nation of a platen; a ribbonvibrator; a frame connected to said vibrator, said frame being pivotedto swing fore-and-aft of the machine and being provided with a crossbar; printing keys; and a pivoted arm adapted to be swung in anup-and-down direction by said printing keys, said arm being providedwith a cam operative on said cross bar and with a dwell portionco-operative also with said cross bar.

14. In a typewriting machine, the combination of a platen; a ribbonvibrator; a pair of operating levers connected with said vibrator andadapted to move .it different extents, a shiftable'frame for operatingsaid levers in alternation, said frame being pivoted to swingfore-and-aft of the machine and being provided with a cross bar;printing keys; and a pivoted arm adapted to be swung in an up-and-downdirection by said printing keys, said arm being provided with cam slotoperative on said cross bar, said cam slot terminating in a dwell.

15. In a typewriting machine, the combination of a ribbon vibrator, anoscillator,

connections between said vibrator and said oscillator, a stop for saidoscillator, a key actuated lever to operate said oscillator, and meansfor enabling said lever to have an idle movement under the keydepression after said oscillator has been moved into contact with saidstop.

16. In a typewriting machine, the combination of a ribbon vibrator,means including an oscillator for varying the throw of the ribbon so asto print through either the upper or lower half thereof, a stop for thevibrator when said means is set for using the lower half of the ribbon,a stop for said oscillator, a key actuated lever for operating saidoscillator, and means for enabling said lever to have an idle movementunder the key depression after said oscillator has been moved intocontact with its stop.

17. In a typewriting machine, the combination of a shiftable platen, aribbon vibrator, a universal bar, a train of connections between saidvibrator and said universal bar, said train including two pivotedmembers, one having a. slot engaging with the other member, part of saidtrain being shiftable with said platen, printing key levers operative onsaid universal bar, a stop for arresting said vibrator after it hasreached the printing position and before the completion of the keystroke, and a second stop arranged between said vibrator and said firstrecited stop and shiftable with said platen, said second stop preventingoverthrow of said vibrator.

18. In a typewriting machine, the combination of a shiftable platen, aribbon vibrator shiftable with said plat-en, a train of key operatedactuating devices for said vibrator including two devices having a lostmotion connection,throw-varying devices, and a pair of ribbon stops, oneshiftable with said platen and the other having an unvarying normalposition for both case positions of said platen, one of said stops beingeffective for both extents of ribbon vobrating movement and the other ofsaid stops being effective for only one extent of vibrating movement.

19. In a typewriting machine, the combination of key levers, a fulcrumoverlying said key levers, springs urging said key levers intoengagement with said. fulcrum. a retaining plate extending transverselyof and beneath said key levers, and a pad on said plate with which theunder edges of said key levers are adapted to contact.

20. In a typewriting machine, the combination of a ribbon vibrator, aplurality of key operated actuators constantly connected thereto, asettable device for rendering said actuators separately effective tovary the throw of the vibrator, and key operated means for actuatingsaid device, said means operating to communicate an unvarying throw tosaid device and to insure the completion of said throw before the end ofthe key stroke.

21. In a typewriting machine, the combination of a ribbon vibrator, aplurality of key operated actuators constantly connect ed thereto, asettable device for rendering said actuators separately effective tovary the throw of the vibrator, key operated means for actuating saiddevice, said means operating to communicate an unvarying throw to saiddevice and to insure the completion of said throw before the end of thekey stroke, and a stop for arresting said device at the end of itsunvarying throw.

22. In a typewriting machine, the combination of a ribbon vibrator, anoperating lever connectedtherewith, two levers connected to saidoperating lever, means for rendering said two levers separatelyeffective, said means comprising a settable lever frame, and keyoperated means for rockin said lever frame to a constant extent an forinsuring the completion of the rocking movement of said frame before theend of the key stroke.

23. In a typewriting machine, the combination of a ribbon vibrator, anoperating lever connected therewith, two levers connected to saidoperating lever, means for rendering said two levers separatelyeffective, said means comp-rising a settable lever frame, key operatedmeans for rocking said lever frame to an unvarying extent and forinsuring the completion of the rocking movement of said frame before theend of the key stroke, and a stop co-operative with said rocking frameto arrest it always at the same point.

24. In a typewriting machine, the combination of a ribbon vibrator, twoactuators constantly connected therewith, a lever frame pivoted betweenits ends and at one and loosely embracing said actuators, and a keyoperated arm provided with a cam portion and a dwell portion, saidportions be ing adapted to co-operate with the other end of said leverframe.

' 25. In a typewriting machine, the combination of a ribbon vibrator,two actuators constantly connected therewith, a lever frame pivotedbetween its ends and at one end loosely embracing said actuators, a keyoperated arm provided with a cam portion and a dwell portion that areadapted to cooperate with the other end of said lever frame, and a fixedstop adapted to arrest said lever frame at the end of its throw.

26. In a typewriting machine, the combination of a ribbon vibrator, atrain of key operated actuating devices connected thereto including acam lever arm having a con stant throw, and a pair of ribbon stops, oneof said stops having a fixed normal relationship with said train and theother of said stops having a variable normal relationship with saidtrain but being always in effective position relative to said train.

27. In a typewriting machine, the oombination of a ribbon vibrator, atrain of key actuated operating devices including a lever provided withan actuating cam having a constant throw, throw-varying devicesoperative independently of said cam lever, and a pair of ribbon stops,one of said stops being effective for both extents of ribbon vibratingmovement and the other of said stops being effective for only one extentof vibrating movement.

28. In a typewriting machine, the combination of a ribbon vibrator, atrain of key operated actuating devices connected thereto including alever arm provided with an actuating cam having a constant throw,throw-varying devices independent of said lever arm, and a pair ofribbon stops, one shiftably settable with said throw-varying devices andthe other having a fixed normal position relative to the actuatingdevices.

29. In a typewriting machine, the combi nation of a ribbon vibrator, atrain of key operated actuating devices including a lever arm providedwith an operating cam, throwvarying devices settable independently ofsaid cam lever, and a pair of ribbon stops, both of said stops beingoperative to limit one extent of vibrating movement, the other extent ofvibrating movement being limited by one only of said stops.

30. In a typewriting machine, the combination of a ribbon vibrator, akey operated lever provided with an actuating cam, a train of devicesoperative by said cam and connected to said vibrator, and a plurality ofstop members, one stop member co-operating with one element of saidtrain to arrest it positively at the limit of its movement and the otherstop member co-operating with another element of said train to preventover-throw of said vibrator.

Signed at Ilion. in the county of Herkimer, and State of New York, this12th day of December, A. D. 1921.

GEORGE A. SEIB.

